1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * nosy - Snoop mode driver for TI PCILynx 1394 controllers 4 * Copyright (C) 2002-2007 Kristian Høgsberg 5 */ 6 7 #include <linux/device.h> 8 #include <linux/errno.h> 9 #include <linux/fs.h> 10 #include <linux/init.h> 11 #include <linux/interrupt.h> 12 #include <linux/io.h> 13 #include <linux/kernel.h> 14 #include <linux/kref.h> 15 #include <linux/miscdevice.h> 16 #include <linux/module.h> 17 #include <linux/mutex.h> 18 #include <linux/pci.h> 19 #include <linux/poll.h> 20 #include <linux/sched.h> /* required for linux/wait.h */ 21 #include <linux/slab.h> 22 #include <linux/spinlock.h> 23 #include <linux/time64.h> 24 #include <linux/timex.h> 25 #include <linux/uaccess.h> 26 #include <linux/wait.h> 27 #include <linux/dma-mapping.h> 28 #include <linux/atomic.h> 29 #include <asm/byteorder.h> 30 31 #include "nosy.h" 32 #include "nosy-user.h" 33 34 #define TCODE_PHY_PACKET 0x10 35 #define PCI_DEVICE_ID_TI_PCILYNX 0x8000 36 37 static char driver_name[] = KBUILD_MODNAME; 38 39 /* this is the physical layout of a PCL, its size is 128 bytes */ 40 struct pcl { 41 __le32 next; 42 __le32 async_error_next; 43 u32 user_data; 44 __le32 pcl_status; 45 __le32 remaining_transfer_count; 46 __le32 next_data_buffer; 47 struct { 48 __le32 control; 49 __le32 pointer; 50 } buffer[13]; 51 }; 52 53 struct packet { 54 unsigned int length; 55 char data[0]; 56 }; 57 58 struct packet_buffer { 59 char *data; 60 size_t capacity; 61 long total_packet_count, lost_packet_count; 62 atomic_t size; 63 struct packet *head, *tail; 64 wait_queue_head_t wait; 65 }; 66 67 struct pcilynx { 68 struct pci_dev *pci_device; 69 __iomem char *registers; 70 71 struct pcl *rcv_start_pcl, *rcv_pcl; 72 __le32 *rcv_buffer; 73 74 dma_addr_t rcv_start_pcl_bus, rcv_pcl_bus, rcv_buffer_bus; 75 76 spinlock_t client_list_lock; 77 struct list_head client_list; 78 79 struct miscdevice misc; 80 struct list_head link; 81 struct kref kref; 82 }; 83 84 static inline struct pcilynx * 85 lynx_get(struct pcilynx *lynx) 86 { 87 kref_get(&lynx->kref); 88 89 return lynx; 90 } 91 92 static void 93 lynx_release(struct kref *kref) 94 { 95 kfree(container_of(kref, struct pcilynx, kref)); 96 } 97 98 static inline void 99 lynx_put(struct pcilynx *lynx) 100 { 101 kref_put(&lynx->kref, lynx_release); 102 } 103 104 struct client { 105 struct pcilynx *lynx; 106 u32 tcode_mask; 107 struct packet_buffer buffer; 108 struct list_head link; 109 }; 110 111 static DEFINE_MUTEX(card_mutex); 112 static LIST_HEAD(card_list); 113 114 static int 115 packet_buffer_init(struct packet_buffer *buffer, size_t capacity) 116 { 117 buffer->data = kmalloc(capacity, GFP_KERNEL); 118 if (buffer->data == NULL) 119 return -ENOMEM; 120 buffer->head = (struct packet *) buffer->data; 121 buffer->tail = (struct packet *) buffer->data; 122 buffer->capacity = capacity; 123 buffer->lost_packet_count = 0; 124 atomic_set(&buffer->size, 0); 125 init_waitqueue_head(&buffer->wait); 126 127 return 0; 128 } 129 130 static void 131 packet_buffer_destroy(struct packet_buffer *buffer) 132 { 133 kfree(buffer->data); 134 } 135 136 static int 137 packet_buffer_get(struct client *client, char __user *data, size_t user_length) 138 { 139 struct packet_buffer *buffer = &client->buffer; 140 size_t length; 141 char *end; 142 143 if (wait_event_interruptible(buffer->wait, 144 atomic_read(&buffer->size) > 0) || 145 list_empty(&client->lynx->link)) 146 return -ERESTARTSYS; 147 148 if (atomic_read(&buffer->size) == 0) 149 return -ENODEV; 150 151 /* FIXME: Check length <= user_length. */ 152 153 end = buffer->data + buffer->capacity; 154 length = buffer->head->length; 155 156 if (&buffer->head->data[length] < end) { 157 if (copy_to_user(data, buffer->head->data, length)) 158 return -EFAULT; 159 buffer->head = (struct packet *) &buffer->head->data[length]; 160 } else { 161 size_t split = end - buffer->head->data; 162 163 if (copy_to_user(data, buffer->head->data, split)) 164 return -EFAULT; 165 if (copy_to_user(data + split, buffer->data, length - split)) 166 return -EFAULT; 167 buffer->head = (struct packet *) &buffer->data[length - split]; 168 } 169 170 /* 171 * Decrease buffer->size as the last thing, since this is what 172 * keeps the interrupt from overwriting the packet we are 173 * retrieving from the buffer. 174 */ 175 atomic_sub(sizeof(struct packet) + length, &buffer->size); 176 177 return length; 178 } 179 180 static void 181 packet_buffer_put(struct packet_buffer *buffer, void *data, size_t length) 182 { 183 char *end; 184 185 buffer->total_packet_count++; 186 187 if (buffer->capacity < 188 atomic_read(&buffer->size) + sizeof(struct packet) + length) { 189 buffer->lost_packet_count++; 190 return; 191 } 192 193 end = buffer->data + buffer->capacity; 194 buffer->tail->length = length; 195 196 if (&buffer->tail->data[length] < end) { 197 memcpy(buffer->tail->data, data, length); 198 buffer->tail = (struct packet *) &buffer->tail->data[length]; 199 } else { 200 size_t split = end - buffer->tail->data; 201 202 memcpy(buffer->tail->data, data, split); 203 memcpy(buffer->data, data + split, length - split); 204 buffer->tail = (struct packet *) &buffer->data[length - split]; 205 } 206 207 /* Finally, adjust buffer size and wake up userspace reader. */ 208 209 atomic_add(sizeof(struct packet) + length, &buffer->size); 210 wake_up_interruptible(&buffer->wait); 211 } 212 213 static inline void 214 reg_write(struct pcilynx *lynx, int offset, u32 data) 215 { 216 writel(data, lynx->registers + offset); 217 } 218 219 static inline u32 220 reg_read(struct pcilynx *lynx, int offset) 221 { 222 return readl(lynx->registers + offset); 223 } 224 225 static inline void 226 reg_set_bits(struct pcilynx *lynx, int offset, u32 mask) 227 { 228 reg_write(lynx, offset, (reg_read(lynx, offset) | mask)); 229 } 230 231 /* 232 * Maybe the pcl programs could be set up to just append data instead 233 * of using a whole packet. 234 */ 235 static inline void 236 run_pcl(struct pcilynx *lynx, dma_addr_t pcl_bus, 237 int dmachan) 238 { 239 reg_write(lynx, DMA0_CURRENT_PCL + dmachan * 0x20, pcl_bus); 240 reg_write(lynx, DMA0_CHAN_CTRL + dmachan * 0x20, 241 DMA_CHAN_CTRL_ENABLE | DMA_CHAN_CTRL_LINK); 242 } 243 244 static int 245 set_phy_reg(struct pcilynx *lynx, int addr, int val) 246 { 247 if (addr > 15) { 248 dev_err(&lynx->pci_device->dev, 249 "PHY register address %d out of range\n", addr); 250 return -1; 251 } 252 if (val > 0xff) { 253 dev_err(&lynx->pci_device->dev, 254 "PHY register value %d out of range\n", val); 255 return -1; 256 } 257 reg_write(lynx, LINK_PHY, LINK_PHY_WRITE | 258 LINK_PHY_ADDR(addr) | LINK_PHY_WDATA(val)); 259 260 return 0; 261 } 262 263 static int 264 nosy_open(struct inode *inode, struct file *file) 265 { 266 int minor = iminor(inode); 267 struct client *client; 268 struct pcilynx *tmp, *lynx = NULL; 269 270 mutex_lock(&card_mutex); 271 list_for_each_entry(tmp, &card_list, link) 272 if (tmp->misc.minor == minor) { 273 lynx = lynx_get(tmp); 274 break; 275 } 276 mutex_unlock(&card_mutex); 277 if (lynx == NULL) 278 return -ENODEV; 279 280 client = kmalloc(sizeof *client, GFP_KERNEL); 281 if (client == NULL) 282 goto fail; 283 284 client->tcode_mask = ~0; 285 client->lynx = lynx; 286 INIT_LIST_HEAD(&client->link); 287 288 if (packet_buffer_init(&client->buffer, 128 * 1024) < 0) 289 goto fail; 290 291 file->private_data = client; 292 293 return stream_open(inode, file); 294 fail: 295 kfree(client); 296 lynx_put(lynx); 297 298 return -ENOMEM; 299 } 300 301 static int 302 nosy_release(struct inode *inode, struct file *file) 303 { 304 struct client *client = file->private_data; 305 struct pcilynx *lynx = client->lynx; 306 307 spin_lock_irq(&lynx->client_list_lock); 308 list_del_init(&client->link); 309 spin_unlock_irq(&lynx->client_list_lock); 310 311 packet_buffer_destroy(&client->buffer); 312 kfree(client); 313 lynx_put(lynx); 314 315 return 0; 316 } 317 318 static __poll_t 319 nosy_poll(struct file *file, poll_table *pt) 320 { 321 struct client *client = file->private_data; 322 __poll_t ret = 0; 323 324 poll_wait(file, &client->buffer.wait, pt); 325 326 if (atomic_read(&client->buffer.size) > 0) 327 ret = EPOLLIN | EPOLLRDNORM; 328 329 if (list_empty(&client->lynx->link)) 330 ret |= EPOLLHUP; 331 332 return ret; 333 } 334 335 static ssize_t 336 nosy_read(struct file *file, char __user *buffer, size_t count, loff_t *offset) 337 { 338 struct client *client = file->private_data; 339 340 return packet_buffer_get(client, buffer, count); 341 } 342 343 static long 344 nosy_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 345 { 346 struct client *client = file->private_data; 347 spinlock_t *client_list_lock = &client->lynx->client_list_lock; 348 struct nosy_stats stats; 349 350 switch (cmd) { 351 case NOSY_IOC_GET_STATS: 352 spin_lock_irq(client_list_lock); 353 stats.total_packet_count = client->buffer.total_packet_count; 354 stats.lost_packet_count = client->buffer.lost_packet_count; 355 spin_unlock_irq(client_list_lock); 356 357 if (copy_to_user((void __user *) arg, &stats, sizeof stats)) 358 return -EFAULT; 359 else 360 return 0; 361 362 case NOSY_IOC_START: 363 spin_lock_irq(client_list_lock); 364 list_add_tail(&client->link, &client->lynx->client_list); 365 spin_unlock_irq(client_list_lock); 366 367 return 0; 368 369 case NOSY_IOC_STOP: 370 spin_lock_irq(client_list_lock); 371 list_del_init(&client->link); 372 spin_unlock_irq(client_list_lock); 373 374 return 0; 375 376 case NOSY_IOC_FILTER: 377 spin_lock_irq(client_list_lock); 378 client->tcode_mask = arg; 379 spin_unlock_irq(client_list_lock); 380 381 return 0; 382 383 default: 384 return -EINVAL; 385 /* Flush buffer, configure filter. */ 386 } 387 } 388 389 static const struct file_operations nosy_ops = { 390 .owner = THIS_MODULE, 391 .read = nosy_read, 392 .unlocked_ioctl = nosy_ioctl, 393 .poll = nosy_poll, 394 .open = nosy_open, 395 .release = nosy_release, 396 }; 397 398 #define PHY_PACKET_SIZE 12 /* 1 payload, 1 inverse, 1 ack = 3 quadlets */ 399 400 static void 401 packet_irq_handler(struct pcilynx *lynx) 402 { 403 struct client *client; 404 u32 tcode_mask, tcode, timestamp; 405 size_t length; 406 struct timespec64 ts64; 407 408 /* FIXME: Also report rcv_speed. */ 409 410 length = __le32_to_cpu(lynx->rcv_pcl->pcl_status) & 0x00001fff; 411 tcode = __le32_to_cpu(lynx->rcv_buffer[1]) >> 4 & 0xf; 412 413 ktime_get_real_ts64(&ts64); 414 timestamp = ts64.tv_nsec / NSEC_PER_USEC; 415 lynx->rcv_buffer[0] = (__force __le32)timestamp; 416 417 if (length == PHY_PACKET_SIZE) 418 tcode_mask = 1 << TCODE_PHY_PACKET; 419 else 420 tcode_mask = 1 << tcode; 421 422 spin_lock(&lynx->client_list_lock); 423 424 list_for_each_entry(client, &lynx->client_list, link) 425 if (client->tcode_mask & tcode_mask) 426 packet_buffer_put(&client->buffer, 427 lynx->rcv_buffer, length + 4); 428 429 spin_unlock(&lynx->client_list_lock); 430 } 431 432 static void 433 bus_reset_irq_handler(struct pcilynx *lynx) 434 { 435 struct client *client; 436 struct timespec64 ts64; 437 u32 timestamp; 438 439 ktime_get_real_ts64(&ts64); 440 timestamp = ts64.tv_nsec / NSEC_PER_USEC; 441 442 spin_lock(&lynx->client_list_lock); 443 444 list_for_each_entry(client, &lynx->client_list, link) 445 packet_buffer_put(&client->buffer, ×tamp, 4); 446 447 spin_unlock(&lynx->client_list_lock); 448 } 449 450 static irqreturn_t 451 irq_handler(int irq, void *device) 452 { 453 struct pcilynx *lynx = device; 454 u32 pci_int_status; 455 456 pci_int_status = reg_read(lynx, PCI_INT_STATUS); 457 458 if (pci_int_status == ~0) 459 /* Card was ejected. */ 460 return IRQ_NONE; 461 462 if ((pci_int_status & PCI_INT_INT_PEND) == 0) 463 /* Not our interrupt, bail out quickly. */ 464 return IRQ_NONE; 465 466 if ((pci_int_status & PCI_INT_P1394_INT) != 0) { 467 u32 link_int_status; 468 469 link_int_status = reg_read(lynx, LINK_INT_STATUS); 470 reg_write(lynx, LINK_INT_STATUS, link_int_status); 471 472 if ((link_int_status & LINK_INT_PHY_BUSRESET) > 0) 473 bus_reset_irq_handler(lynx); 474 } 475 476 /* Clear the PCI_INT_STATUS register only after clearing the 477 * LINK_INT_STATUS register; otherwise the PCI_INT_P1394 will 478 * be set again immediately. */ 479 480 reg_write(lynx, PCI_INT_STATUS, pci_int_status); 481 482 if ((pci_int_status & PCI_INT_DMA0_HLT) > 0) { 483 packet_irq_handler(lynx); 484 run_pcl(lynx, lynx->rcv_start_pcl_bus, 0); 485 } 486 487 return IRQ_HANDLED; 488 } 489 490 static void 491 remove_card(struct pci_dev *dev) 492 { 493 struct pcilynx *lynx = pci_get_drvdata(dev); 494 struct client *client; 495 496 mutex_lock(&card_mutex); 497 list_del_init(&lynx->link); 498 misc_deregister(&lynx->misc); 499 mutex_unlock(&card_mutex); 500 501 reg_write(lynx, PCI_INT_ENABLE, 0); 502 free_irq(lynx->pci_device->irq, lynx); 503 504 spin_lock_irq(&lynx->client_list_lock); 505 list_for_each_entry(client, &lynx->client_list, link) 506 wake_up_interruptible(&client->buffer.wait); 507 spin_unlock_irq(&lynx->client_list_lock); 508 509 pci_free_consistent(lynx->pci_device, sizeof(struct pcl), 510 lynx->rcv_start_pcl, lynx->rcv_start_pcl_bus); 511 pci_free_consistent(lynx->pci_device, sizeof(struct pcl), 512 lynx->rcv_pcl, lynx->rcv_pcl_bus); 513 pci_free_consistent(lynx->pci_device, PAGE_SIZE, 514 lynx->rcv_buffer, lynx->rcv_buffer_bus); 515 516 iounmap(lynx->registers); 517 pci_disable_device(dev); 518 lynx_put(lynx); 519 } 520 521 #define RCV_BUFFER_SIZE (16 * 1024) 522 523 static int 524 add_card(struct pci_dev *dev, const struct pci_device_id *unused) 525 { 526 struct pcilynx *lynx; 527 u32 p, end; 528 int ret, i; 529 530 if (pci_set_dma_mask(dev, DMA_BIT_MASK(32))) { 531 dev_err(&dev->dev, 532 "DMA address limits not supported for PCILynx hardware\n"); 533 return -ENXIO; 534 } 535 if (pci_enable_device(dev)) { 536 dev_err(&dev->dev, "Failed to enable PCILynx hardware\n"); 537 return -ENXIO; 538 } 539 pci_set_master(dev); 540 541 lynx = kzalloc(sizeof *lynx, GFP_KERNEL); 542 if (lynx == NULL) { 543 dev_err(&dev->dev, "Failed to allocate control structure\n"); 544 ret = -ENOMEM; 545 goto fail_disable; 546 } 547 lynx->pci_device = dev; 548 pci_set_drvdata(dev, lynx); 549 550 spin_lock_init(&lynx->client_list_lock); 551 INIT_LIST_HEAD(&lynx->client_list); 552 kref_init(&lynx->kref); 553 554 lynx->registers = ioremap_nocache(pci_resource_start(dev, 0), 555 PCILYNX_MAX_REGISTER); 556 if (lynx->registers == NULL) { 557 dev_err(&dev->dev, "Failed to map registers\n"); 558 ret = -ENOMEM; 559 goto fail_deallocate_lynx; 560 } 561 562 lynx->rcv_start_pcl = pci_alloc_consistent(lynx->pci_device, 563 sizeof(struct pcl), &lynx->rcv_start_pcl_bus); 564 lynx->rcv_pcl = pci_alloc_consistent(lynx->pci_device, 565 sizeof(struct pcl), &lynx->rcv_pcl_bus); 566 lynx->rcv_buffer = pci_alloc_consistent(lynx->pci_device, 567 RCV_BUFFER_SIZE, &lynx->rcv_buffer_bus); 568 if (lynx->rcv_start_pcl == NULL || 569 lynx->rcv_pcl == NULL || 570 lynx->rcv_buffer == NULL) { 571 dev_err(&dev->dev, "Failed to allocate receive buffer\n"); 572 ret = -ENOMEM; 573 goto fail_deallocate_buffers; 574 } 575 lynx->rcv_start_pcl->next = cpu_to_le32(lynx->rcv_pcl_bus); 576 lynx->rcv_pcl->next = cpu_to_le32(PCL_NEXT_INVALID); 577 lynx->rcv_pcl->async_error_next = cpu_to_le32(PCL_NEXT_INVALID); 578 579 lynx->rcv_pcl->buffer[0].control = 580 cpu_to_le32(PCL_CMD_RCV | PCL_BIGENDIAN | 2044); 581 lynx->rcv_pcl->buffer[0].pointer = 582 cpu_to_le32(lynx->rcv_buffer_bus + 4); 583 p = lynx->rcv_buffer_bus + 2048; 584 end = lynx->rcv_buffer_bus + RCV_BUFFER_SIZE; 585 for (i = 1; p < end; i++, p += 2048) { 586 lynx->rcv_pcl->buffer[i].control = 587 cpu_to_le32(PCL_CMD_RCV | PCL_BIGENDIAN | 2048); 588 lynx->rcv_pcl->buffer[i].pointer = cpu_to_le32(p); 589 } 590 lynx->rcv_pcl->buffer[i - 1].control |= cpu_to_le32(PCL_LAST_BUFF); 591 592 reg_set_bits(lynx, MISC_CONTROL, MISC_CONTROL_SWRESET); 593 /* Fix buggy cards with autoboot pin not tied low: */ 594 reg_write(lynx, DMA0_CHAN_CTRL, 0); 595 reg_write(lynx, DMA_GLOBAL_REGISTER, 0x00 << 24); 596 597 #if 0 598 /* now, looking for PHY register set */ 599 if ((get_phy_reg(lynx, 2) & 0xe0) == 0xe0) { 600 lynx->phyic.reg_1394a = 1; 601 PRINT(KERN_INFO, lynx->id, 602 "found 1394a conform PHY (using extended register set)"); 603 lynx->phyic.vendor = get_phy_vendorid(lynx); 604 lynx->phyic.product = get_phy_productid(lynx); 605 } else { 606 lynx->phyic.reg_1394a = 0; 607 PRINT(KERN_INFO, lynx->id, "found old 1394 PHY"); 608 } 609 #endif 610 611 /* Setup the general receive FIFO max size. */ 612 reg_write(lynx, FIFO_SIZES, 255); 613 614 reg_set_bits(lynx, PCI_INT_ENABLE, PCI_INT_DMA_ALL); 615 616 reg_write(lynx, LINK_INT_ENABLE, 617 LINK_INT_PHY_TIME_OUT | LINK_INT_PHY_REG_RCVD | 618 LINK_INT_PHY_BUSRESET | LINK_INT_IT_STUCK | 619 LINK_INT_AT_STUCK | LINK_INT_SNTRJ | 620 LINK_INT_TC_ERR | LINK_INT_GRF_OVER_FLOW | 621 LINK_INT_ITF_UNDER_FLOW | LINK_INT_ATF_UNDER_FLOW); 622 623 /* Disable the L flag in self ID packets. */ 624 set_phy_reg(lynx, 4, 0); 625 626 /* Put this baby into snoop mode */ 627 reg_set_bits(lynx, LINK_CONTROL, LINK_CONTROL_SNOOP_ENABLE); 628 629 run_pcl(lynx, lynx->rcv_start_pcl_bus, 0); 630 631 if (request_irq(dev->irq, irq_handler, IRQF_SHARED, 632 driver_name, lynx)) { 633 dev_err(&dev->dev, 634 "Failed to allocate shared interrupt %d\n", dev->irq); 635 ret = -EIO; 636 goto fail_deallocate_buffers; 637 } 638 639 lynx->misc.parent = &dev->dev; 640 lynx->misc.minor = MISC_DYNAMIC_MINOR; 641 lynx->misc.name = "nosy"; 642 lynx->misc.fops = &nosy_ops; 643 644 mutex_lock(&card_mutex); 645 ret = misc_register(&lynx->misc); 646 if (ret) { 647 dev_err(&dev->dev, "Failed to register misc char device\n"); 648 mutex_unlock(&card_mutex); 649 goto fail_free_irq; 650 } 651 list_add_tail(&lynx->link, &card_list); 652 mutex_unlock(&card_mutex); 653 654 dev_info(&dev->dev, 655 "Initialized PCILynx IEEE1394 card, irq=%d\n", dev->irq); 656 657 return 0; 658 659 fail_free_irq: 660 reg_write(lynx, PCI_INT_ENABLE, 0); 661 free_irq(lynx->pci_device->irq, lynx); 662 663 fail_deallocate_buffers: 664 if (lynx->rcv_start_pcl) 665 pci_free_consistent(lynx->pci_device, sizeof(struct pcl), 666 lynx->rcv_start_pcl, lynx->rcv_start_pcl_bus); 667 if (lynx->rcv_pcl) 668 pci_free_consistent(lynx->pci_device, sizeof(struct pcl), 669 lynx->rcv_pcl, lynx->rcv_pcl_bus); 670 if (lynx->rcv_buffer) 671 pci_free_consistent(lynx->pci_device, PAGE_SIZE, 672 lynx->rcv_buffer, lynx->rcv_buffer_bus); 673 iounmap(lynx->registers); 674 675 fail_deallocate_lynx: 676 kfree(lynx); 677 678 fail_disable: 679 pci_disable_device(dev); 680 681 return ret; 682 } 683 684 static struct pci_device_id pci_table[] = { 685 { 686 .vendor = PCI_VENDOR_ID_TI, 687 .device = PCI_DEVICE_ID_TI_PCILYNX, 688 .subvendor = PCI_ANY_ID, 689 .subdevice = PCI_ANY_ID, 690 }, 691 { } /* Terminating entry */ 692 }; 693 694 MODULE_DEVICE_TABLE(pci, pci_table); 695 696 static struct pci_driver lynx_pci_driver = { 697 .name = driver_name, 698 .id_table = pci_table, 699 .probe = add_card, 700 .remove = remove_card, 701 }; 702 703 module_pci_driver(lynx_pci_driver); 704 705 MODULE_AUTHOR("Kristian Hoegsberg"); 706 MODULE_DESCRIPTION("Snoop mode driver for TI pcilynx 1394 controllers"); 707 MODULE_LICENSE("GPL"); 708